function handlenum=gethandlenum(h)
% getfignum: get the handle number as a double
%
% handlenum=gethandlenum(h)
%
% For Matlab version before Matlab R2014b (version 8.4) graphics handles
% were doubles. As of version 8.4, they became handles. Therefore, a little
% more work has to be done to get the figure number
%
% handlenum ... graphics handle number as a double
% h         ... handle to graphics object
% 
% by K.W. Hall, Dec 2014
%
% NOTE: This SOFTWARE may be used by any individual or corporation for any purpose
% with the exception of re-selling or re-distributing the SOFTWARE.
% By using this software, you are agreeing to the terms detailed in this software's
% Matlab source file.

% BEGIN TERMS OF USE LICENSE
%
% This SOFTWARE is maintained by the CREWES Project at the Department
% of Geology and Geophysics of the University of Calgary, Calgary,
% Alberta, Canada.  The copyright and ownership is jointly held by
% its 'AUTHOR' (identified above) and the CREWES Project.  The CREWES
% project may be contacted via email at:  crewesinfo@crewes.org
%
% The term 'SOFTWARE' refers to the Matlab source code, translations to
% any other computer language, or object code
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% Terms of use of this SOFTWARE
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% 1) This SOFTWARE may be used by any individual or corporation for any purpose
%    with the exception of re-selling or re-distributing the SOFTWARE.
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%check number of input arguments
if nargin < 1 %MATLAB handles too many input args, so just need to check for not enough
    error('crewes:utilities:getfignum','Incorrect number of input arguments')
end

try
    if verLessThan('matlab','8.4')
        handlenum = h;
    else
        handlenum = get(h, 'Number');
    end
catch ex
    error('crewes:utilities:getfignum',ex.message);
end